Can we add 2 small modern GCP VM flags for ops manager VMs?

[dsboulder]

Is your feature request related to a problem? Please describe.

Relative small requests for the om VM lifecycle manager on GCP:

1. Support machine types, like e2-standard-2, rather than just customer N1 CPU/memory. This will save $$$ and let us use newer/modern VMs.
2. Support boot disk types, like Balanced instead of just Standard. This will speed ops manager up significantly without adding too too much cost.

Describe the solution you'd like

Checked and we don't have it yet. https://github.com/pivotal-cf/om/blob/3da97ebf52c67655c60f18ded08274914b8538e8/vmlifecycle/vmmanagers/gcp.go#L31

Describe alternatives you've considered

No response

Additional context

This is coming from the Tanzu Platform Engineering team who's deploying TAS on GCP. They can't get a clean upload of the TAS tile because of how long it takes. They switched the boot disk to Balanced and then it worked, but had to do it by hand.